MnS@CoMn-LDH composite material, and preparation method and application thereof

A composite material and thermal reaction technology, applied in the field of electrochemistry and nanomaterials, can solve the problems of unsatisfactory electrochemical performance, limited application, low conductivity, etc., and achieve the advantages of rapid electron transmission, simple preparation method, and high current effect of density

Active Publication Date: 2019-09-06
SHANGHAI INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the aggregation and low conductivity of LDH limit the transport of ions / electrons, leading to unsatisfactory electrochemical performance and limiting its further application.

Method used

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  • MnS@CoMn-LDH composite material, and preparation method and application thereof
  • MnS@CoMn-LDH composite material, and preparation method and application thereof
  • MnS@CoMn-LDH composite material, and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] A kind of preparation method of MnS@CoMn-LDH composite material such as figure 1 shown, including the following steps:

[0032] The first step is hydrothermal, 0.1g MnCl 2 4H 2 O was dissolved in 25mL of deionized water, and 5mL of 0.1mol / L Na 2 S, after magnetic stirring for 20min, transfer to a 50mL polytetrafluoroethylene-lined stainless steel autoclave for the first step of hydrothermal reaction, the hydrothermal reaction temperature is 120°C, and the hydrothermal reaction time is 8h; Take it out to cool, then centrifuge, wash, and vacuum dry at 60°C for 12 hours to obtain MnS powder. In the second step of hydrothermal treatment, 1mmolMnCl 2 4H 2 O, 2mmol Co(NO 3 ) 2 ·6H 2 O, 5 mmol NH 4 F. Dissolve 5 mmol urea in deionized water, stir magnetically for 30 minutes, add the MnS sample prepared by hydrothermal treatment in the first step, and transfer it to a polytetrafluoroethylene-lined stainless steel autoclave after mixing evenly, and carry out the second ...

Embodiment 2

[0035] A preparation method of MnS@CoMn-LDH composite material, comprising the following steps:

[0036] The first step is hydrothermal, 0.1g MnCl 2 4H 2 O was dissolved in 25mL of deionized water, and 5mL of 0.1mol / L Na 2 S, after magnetic stirring for 20min, transfer to a 50mL polytetrafluoroethylene-lined stainless steel autoclave for the first step of hydrothermal reaction, the hydrothermal reaction temperature is 150°C, and the hydrothermal reaction time is 8h; Take it out to cool, then centrifuge, wash, and vacuum dry at 60°C for 12 hours to obtain MnS powder. In the second step of hydrothermal treatment, 1mmolMnCl 2 4H2 O, 2mmol Co(NO 3 ) 2 ·6H 2 O, 5 mmol NH 4 F. Dissolve 5 mmol urea in deionized water, stir magnetically for 30 minutes, add the MnS sample prepared by hydrothermal treatment in the first step, and transfer it to a polytetrafluoroethylene-lined stainless steel autoclave after mixing evenly, and carry out the second step of water heating. Thermal r...

Embodiment 3

[0039] A preparation method of MnS@CoMn-LDH composite material, comprising the following steps:

[0040] The first step is hydrothermal, 0.1g MnCl 2 4H 2 O was dissolved in 25mL of deionized water, and 5mL of 0.1mol / L Na 2 S, after magnetic stirring for 20min, transfer to a 50mL polytetrafluoroethylene-lined stainless steel autoclave for the first step of hydrothermal reaction, the hydrothermal reaction temperature is 120°C, and the hydrothermal reaction time is 12h; Take it out to cool, then centrifuge, wash, and vacuum dry at 60°C for 12 hours to obtain MnS powder. In the second step of hydrothermal treatment, 1mmolMnCl 2 4H 2 O, 2mmol Co(NO 3 ) 2 ·6H 2 O, 5 mmol NH 4 F. Dissolve 5 mmol urea in deionized water, stir magnetically for 30 minutes, add the MnS sample prepared by hydrothermal treatment in the first step, and transfer it to a polytetrafluoroethylene-lined stainless steel autoclave after mixing evenly, and carry out the second step of water heating. Therma...

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Abstract

The invention relates to an MnS@CoMn-LDH composite material, and a preparation method and an application thereof. The preparation method of the composite material comprises the steps of 1) dissolvingsoluble manganese salt in water, then adding sulfide, carrying out a primary hydrothermal reaction, and carrying out centrifuging, washing and drying to obtain MnS; and 2) dissolving the soluble manganese salt, soluble cobalt salt, ammonium fluoride and urea in the water, then adding the MnS, carrying out a secondary hydrothermal reaction, and carrying out cooling, centrifuging, washing and dryingto obtain the MnS@CoMn-LDH composite material. The composite material is prepared into a working electrode for a supercapacitor. Compared with the prior art, the MnS@CoMn-LDH composite material is synthesized through the two-step hydrothermal reactions; the composite material contains rich mesopores and micropores so as to achieve good electrochemical performance; the preparation method of the composite material is simple and environment-friendly; the synthesis time is greatly shortened; and the large-scale production of high-purity MnS@CoMn-LDH composite materials is facilitated.

Description

technical field [0001] The invention belongs to the technical field of electrochemistry and nanometer materials, and relates to a MnS@CoMn-LDH composite material, a preparation method thereof, and an application in supercapacitors. Background technique [0002] With the increasing environmental pollution and fossil fuel consumption, the development of renewable energy storage devices has become increasingly important. Supercapacitors, also known as electrochemical capacitors, have attracted extensive attention from industry and academia due to their high power density, high rate capability, fast charge-discharge process, and long cycle life (>100,000 cycles). The performance of supercapacitors essentially depends on the properties of the electrode materials. In recent years, transition metal oxides, sulfides, and hydroxides have been extensively studied as electrode materials for battery-type supercapacitors due to their high theoretical specific capacitance. Among the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01G11/30H01G11/24H01G11/86B82Y30/00B82Y40/00
CPCB82Y30/00B82Y40/00H01G11/24H01G11/30H01G11/86Y02E60/13
Inventor 蒋继波胡晓敏刘顺昌王露露丛海山张莹杨圆圆马健孙瑶馨韩生
Owner SHANGHAI INST OF TECH
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